DE1778094B2 - Device for continuous perforation of the wall of thin-walled folded tubes - Google Patents

Description

The invention creates a device to continue ! ends punching the wall of thin-walled trap tubes made of thermoplastic synthetic material in particular. in particular of orange pipes, mn one l'üh ment for the pleated tube, a finnighting to the feed ties through the device, at least a cutter / eugtragei and at least one Movable relative to / around the pipe on the cutting unit layered cutting tools / eug.

Fahenrohrs made of K; mim si oil! w erder in seven times *! ' as Dran.'i'eroh 'eii _; . .-be / i. / ii this ^(lS / w et k miissv'Ii sit 'nii 1 a \ it i'a number of ν ei' .ilinisi. ■■ ■ ill ;. ¹ f small knowledge of the need for knowledge: i valued IV ^ eii.iat! . ■■: -. '! \ V .. 1! 1 rι ■ ■. ■ Wet' here, M is '. Λ .. <. <'<:; \ M <he Slits longitudinally in the corrugation of the pipe wall. In this case it is sufficient if the folding pipe is continuously passed between, for example, four circular saw blades which cut the corrugated backs of the corrugation of the pipe wall.

Often there is also an arrangement of the holes in the wave troughs he wishes. For this purpose it is known to use a / cniral to use the mandrel arranged in the folding tube. However, such cutting thorns have a Variety of technical difficulties. One is therefore switched to it, already in the wave troughs to provide outwardly protruding bulges in the manufacture of the folded tube and these by means of a tool rotating around the folded tube or cut off. However, this is cumbersome because the The tool is constantly rotating around the trap tube. Tm to work rationally / u must be able to go beyond that the RilWing of the trap tube helically get lost. After all, the training of the corresponding compulsions is time-consuming

/ um Bringet "of breakthroughs in the WeI-ieniakin is it also known !, following an Ev iruueroifnung in the area of the corrugations of the roIi to arrange the forming jaws that are producing and pushing the folded tube in the inside of the tube in a cutting tool, which engages with its cutting edges in the corrugations. When advancing the trap tube The wave troughs are slit over the cutting edges. The cutting edges can be inside the pipe radially resilient and also for setting tier Depth of cut be adjustable. So that the Schlii / e go through the pipe wall, the cutting edges on the inner surface of the i'01 must nibuck grind, creating for the cutting edges and form jaws there is high wear. Does that work well Tool in a place where the Rohrmaieria! is still partially plastic. can easily imagine a Kimsistoffbari form the cutting edges by which the clean slitting of the wave troughs is impaired. Work but the well-known tool where the plastic is already hard. sees the danger that the resilient The cutting edges slide on the pipe wall without creating a Schill / z.u.

By contrast, the invention solves the problem of providing a device / 11111 continuous punching vo 1 thin-walled fall pipes / ti create which With little structural effort, the creation of burr-free holes largely of any shape, both in the wavy back. as well as the wave troughs.

This is done with a device of the type mentioned at the beginning At crlind according to that, that.! this cutting tool has an approximately perpendicular / ur / 11 punching The pipe wall of a movable standard punch is that the cutting edge is tied in a manner known per se. Sian / stamp saw / similarly revolves, and that dit Front face recedes away from the cutting edge.

The device according to the invention allows it. Process practically any trap tubes / u, whereby grat Ireie holes in thin-walled trap tubes with little structural effort, namely without counter-supports ties cutting tool can be produced

1 in tlas Punching of Kiinsislol foils. Like bag foils, it is also already known, tlas I .ochw ei k / eug on a longitudinally movable sleeve with a cutting channel in the shape of a corner! veiling, ί Siirnr.ind and from eini v. .your! of punching ¹ . ^! i v'.ie sleeve einreileiulen les

Train standing stamp. When the The punching area of the foil is pressed against the cutting edge and the cut-out sleeve by the punch Perforated leaflets printed in the case. For a clean Cut is required for this device. to clamp the / u perforating film around the perforation area. The foil material processed with this known device gives way in its strength properties. especially in its shape, / u very much from a folded tube than that known Device a model for the device according to the invention had been able to form.

The device according to the invention can either with intermittent feed, with which the Sianzstempehräger even flour in the longitudinal direction of the pipe or at most one step, whereupon he is moved back again, or work with continuous feed. Essential is in the invention that the cutting edge sagittoothur- : ig runs, while the face of the cutting edge backs away. In this way, the stamp penetrates first at individual points tlie plastic pipe wall to be punched and reverberate then the piece to be punched out between the S.iüozaiin points so that it does not collapse to the side and can still get caught around the edge of the hole.

Even if the arrangement of the sawtooth mushrooms differs depending on the cross-section of the punch can be, it is advantageous that with angular Suinzstempelquerschniu on all longitudinal edges of the Sianzstempels saw tooth tips are located. Preferably, the punch has the profile of a long to the Rounded rectangle corners with the cutting edge sloping from the corners to both sides. Among other things, this increases the service life of the punch. With a narrow rectangular profile this rounding can go so far that instead of a narrow Rochteckscite there is a semicircular arc.

According to a preferred embodiment it is provided that the sawtooth spikes are unequal. In this way, the penetration forces are better distributed.

The punches are made of high quality steel. Since they are quite small (the cross-section of a The water inlet hole of a corrugated plastic drainage pipe is on the order of a few millimeters) and it is difficult to grind the end face from the solid with such small tools the stamping stamps made in several parts.

Since several rows of water entry holes are often to be provided in a drainage pipe, they are advantageous several cutting tool carriers arranged distributed over the circumference of the pipe. In practice you will usually arrange four to six cutting tool carriers. | e according to the needs can of course also be a larger one or a smaller number can be selected, the leather cutting tool holder creates a row of holes.

Even if it is possible in principle. that each .Schneidwerkzeugträger only a single punch carries, it is preferred, however, that several punches in the pipe longitudinal direction on each cutting tool carrier are arranged one behind the other. In this way, the performance of the device is increased significantly.

In a preferred embodiment of the Vorrich-Hing According to the invention, the pipe advance takes place intermittently. The working stroke of the punch takes place then expediently while the pipe is at a standstill.

The punch supports are advantageous on theirs Front sides ribbed according to the profile of the folded tube. With these ribs they grip into the profile of the Folding tube.

Exemplary embodiments of punching devices according to the invention are shown below on the basis of the sehematic ones Drawings explained.

F 1 g. 1 shows the section 1-1 from FIG. 2 through an embodiment, in which the pipe feed takes place intermittently and the cutting tool carriers radially be moved towards and away from the pipe:

F 1 g. 2 shows the top view of the device according to F 1 g. 1;

F 1 g. 3 to b show different training options the punch, each of the figures shows on the left the view from the front of a slanting tool. underneath the view from above of the same and to the right of it the view from the left of the same. The scale is opposite the F i g. 1 and 2 significantly enlarged;

F i g. 7 shows, on a still further enlarged scale, the composition of a punching die with a rectangular profile from two part panels.

From the in F 1 g. 1 and 2 only the essential parts are shown; Mounts. Camp. Machine frames and the like are omitted for the sake of clarity. Also for clarity For the sake of this, the device is shown as being provided with only two cutting tool carriers. Of course, in practice you will usually have a larger number of cutting tool carriers, for example many or six, provide.

The trap tube, which is to be provided with holes, is only shown pulled out a short length. The through the part protruding from the device is indicated by dash-dotted lines. The direction of travel of the folded tube is indicated by the arrow 2.

The guide bore 4 for the trap tube extends through the base part 3 of the device. In F Ϊ g. 1 left "carries the basic part! 3 guides 5 for the cutting tool carriers 6, which are in the guides 5 are mounted vertically back and forth displaceable. the Cutting tool carriers 6 each carry four punching dies 7. The sum punches 7 are each in an axial row arranged. Your vertical center lines each intersect the center line of the guide hole 4. For the Movement of the cutting tool carriers 6 are used by connecting rods 8 which are attached to the cutting tool carriers 6 are articulated by means of the bolts 9. The other ends of the connecting rods 8 are on pins 10 of eccentric disks II stored, which sit on shafts 12 that are again stored in the base part 3. At their other ends, the shafts 12 carry gears 13th which mesh with a drive gear 14. The drive gear 14 is mounted on a collar of the base part 3 and firmly connected to a sprocket 15, via which the rotary movement is introduced into the device. An intermittent feed device For the folded tube, the shaft 12 of the lower ex / enter disk 11 is driven by means of an extension 16. This shaft has a curve ring 17 on its find, which has an inclined guide channel on its circumference 18 possesses, in which pins 20 seated on a disc 19 fit slidably. At both ends of the guide channel 18 catch and guide hooks 21 are provided, which when the cam drum rotates 17 in each case the loaded

Detect subsequent pin 20, guide the canal and ^{brake again at Sl 1} IiIuIJ, so ο.ill he at iJlt Ί romine! ι iherlläehc stops. The causal factor. the Faiig hooks and the Stifle 20 are the I 'InTsLlitlichkcii haiher in I' i g. The shaft 22 you see 19 drives a ball wheel 24 via a bevel gear 2 ″? One of the two feed rollers on the shaft 2i:! 2h sit / t. The two feed rollers !! have sprockets 27 on the liner top which are attacked each other in the I in and a syiu hioiie rotation of the two Kn] leu bewiiken each other, the feed rollers are kleii ausgetülnt possible iitui leiehi prevent sto leaders · masses.! old occur during intermittent Ik-tneh the Vurselinhroilcii are mn circumferential grooves.

28 of almost half a circle profile. The radius of these grooves is equal to the outer radius of the /.11 lehen ile fall pipe. There are ribs near the 1 possibly of the groove

29 provided, which icweils can pour into the I. 'circumferential grooves M) of the l'altenrohics. The ribs 24 must not extend over the entire length of the albums. otherwise! They suffocate themselves over almost a third of the circular arc that forms the groove profile. and / was in the middle of it. In operation the Vm works direction v> 11 follows.

The folded tube will pull from the left as shown. If the device is now driven via the chain wheel 15, s <; rotate the Ex / Enterschciben 11 mn the pin 10 and with the help of the connecting rods 8 let the punch holder go up and down, so that.! during each stroke the sum / stamp dips sufficiently deep η the Rohrwandiing I to remove holes from it. The holes can be punched out of the woolen nodules of the pipe wall as well as from the shafts of the pipe wall; there are corresponding adjusting devices, not shown in the 7th part, for the synchronization, the advancing device and the punching device These can, for example, be obtained from a flange arrangement in the shaft 12. w ee the shaft 12 separates into / white parts. The ^Plans-; You can then miu-nunic in any corrected rotation position. - r! esi verbiüideti v.er den. While the device is being driven, the folding tube is always advanced when the tips of the punches 7 are outside the envelope of the ralter tube. For this purpose, the vengeance 16 of the while 12 drive the kirvenirunime! Ί7 on With every turn of the curve chronime! 17. Which also corresponds to the cutting mechanism / .cug carrier β in this way, a catch hook 21 of the Kur \ emromiv; el 17 grips the pin 20 of the disk 19 resting on the trough surface and thus rotates the shaft 22 by an angle The feed rollers 26 are rotated around a corresponding mail, which move the folded tube forward by one step after the implementation, so that now, when the folded tube again has come to a standstill, the punch can again plunge into the area of the folded tube

Of course, the various processes must be properly synchronized, ie. the folding tube must lie at rest during the entire punching process. The feeding operation must take place, wah rcnd the Stan / stempcl are disengaged This is easily possible as - how he knows from the drawing - of the guide channel 18 including the F'uhningshakens 21 only a fraction of the Gesamtumlanges the Kiirvenirommel 17 occupies. In terms of time, this fraction also corresponds to only a fraction of the accumulation stroke.

It should also be mentioned that in the embodiment shown, which only has two tool carriers. useful also rope-like tours in the Slanzsiempel area be provided for the folding tube so that the (iefahi of the compression of the folds lohies is avoided when punching. Hey Vorriehttin genes as they are primarily built in practice. in other words, those where four or six inches pelreihen are arranged, with one Stan / steinpelzeile is opposite another, this one occurs Problem does not arise, since the abundance of punching dies coming into Fin grill at the same time is the pipe of all beings ten braced

As already explained at the beginning, the shape of the stamp itself is of essential importance for the proper functioning of the punching device. I 1 g. 5 shows a favorable embodiment of a punch 60 of this type. This has the ^{elongated profile seen in plan view 1} , the lines of which are rounded off by such a radius, that '. the entire narrow sides have become semicircles. The end face 61 is formed by a V-shaped groove 62, which sinks from the two narrow sides straight down to the stone peiinuie, so that a kinked negative roof profile is created. This arrangement means that the face of the punch vveiehl from all edges - around the inside of this! 'Laugh back. When piercing into the circumferential surface of the pipe, the sawtooth tips 63 first come into contact with the pipe wall and pierce it. If you see the linstitching to form a closed circumferential line, the punched-out piece is held securely between the cutting edges of the punch, so that it does not have the option of sticking with a more or less large web on the wall of the pipe and simply folding it inward .

The manufacture of the stamp according to FIG. 3 is 111 F 1 g. 7 indicated schematically. The stamp can consist of two halves 60; i and 6Oi), in each of which First a V-shaped inclined groove 66 is ground in will. Both halves are the same. Then the two Die halves - as indicated by the arrows at the foot of the same - moved towards one another. You can be soldered or riveted together in this position. It may also be useful to them only in such a position firmly in the Siempckräger tighten.

FIG. 4 shows another embodiment, which is% <> n of the embodiment according to FIG. 3 only differs in that the V-shaped channel 68 is not kinked in the end face, but runskreisbogenfor carried.

Another embodiment is shown in Fig. 5. The punch 69 shown there differs from the Stan / .stempe! according to FIG. 3 in that di (end face 5 part de punch shown on the right is set down in the middle, so that the irr left upper part of F i g. Only then comes into engagement when the dor left part of the stamp shown non its cutting Opera already completed Also has such a stamp

QQA

form has especially developed bcwiilm. This stamp k; mii can easily be made from /. two parts running along the indicated center line are joined together.

Another stamp form is π Γ i g. b shown. Of the Stan / .stcinpel 70 shown there distinguishes sn.li

of the geniiil! I i g. 5 by the asymmetrical Λι Order of the V-shaped groove on the face. Dua this training will be achieved. that the different S [IiI / cn flour come into engagement more on the same side.

For this purpose 2 sheets of drawings

509:

Claims (9)

Patent claims: 1. Performing / around continuous perforation of the wall of thin-walled folded tubular eggs: from ms special thermoplastic plastic, in particular of pressure tubes. with a guide for that Fall pipe. of an institution / to Vwschub des Pipe through the device, at least one cutter, and at least one on The cutting unit / eugtrager can be moved relative to / around the pipe stored cutting unit / eug. d a characterized in that the cutting tool a is approximately perpendicular to the / u perforating pipe wall (i) movable Sian / stamp (7). dai.i in itself be known way the cutting edge of the Sian / sienipel saw / ahnformig circulates, and that the face (61) \ on receding away from the cutting edge. 2. Device according to claim!, Characterized in that that with angular stan / sienipelquerschniii * o on all longitudinal edges (64) of the suin / stamp (7) Saw / ahnspii / s (63). 3. Vorrichiung according to claim 1 or 2, characterized in that the Sianz.stemne! (7) the profile has a> long right ¹ * - rounded at the corners and that the cutting edge slopes down from the corners on both sides. 4. Vorrichiung according to one of claims 1 to 3, characterized in that the sawtooth tip / eii (63) are unequal. 5. Vorrichiung according to any egg of claims 1 to 4. characterized in that several cutting tool carriers (6) about the length of the pipe are arranged distributed. to. Device according to any one of claims 1 to 5, characterized in that the slan / stcm pci (7) are arranged one behind the other in the longitudinal direction of the pipe aiii leather cutting tool carriers (6). 7. Vorrichiung according to any animal claims 1 to h. characterized in that the pipe feed is intermining is. 8. Device according to one of claims 1 to 7. characterized in that the cutting tool carriers (6) on their end ropes corresponding to the Prolil of the trap tube are ribbed and engage with these ribs in the prolile of the folded tube. 9. Device according to one of claims 1 to 8. dadiin h characterized in that the cutting tool carrier (6) is arranged outside of the folded tube.